The Prowla Troll Grip float has been designed to allow you to fish baits in fast flowing rivers, or behind a boat. The bent inner tube grips your line and prevents the float from being pushed towards the trace by the current if you hold back when trotting' a swim. This would cause your bait to be raised upwards from the set fishing depth and is undesirable. Simply thread onto your main line and set the required depth with a sliding stop knot. Troll Grip floats are available in 4 sizes, each of which can be perfectly balanced with one of Prowla's quick change In- Line Sinkers.